Is it possible with biber to convert

  month = {04},


  month = apr,

in which apr is a BibTeX macro?

I am aware of the mapping facilities, but the closest I can currently get, using

<map_step map_field_source="MONTH" map_match="04" map_replace="apr" />


  month = {apr},

You can try the option --nostdmacros on an earlier run to stop biber defining these macros internally in first place? If this doesn't work, I will address this in the biber dev version as this biblatex -> bibtex conversion is quite important.

There is a new option in 1.7 (currently in dev folder on SourceForge) called --tool_macro_fields which can be set to a csv list of fields to output without quoting (that is, their value is a bibtex macro). You will need biblatex 2.6. See the biber help output or the PDF manual.

So, in your case, you'll call biber like this:

biber --tool --tool_resolve --tool_macro_fields=month -g <conf> file.bib
  • I am unclear on what you mean exactly. I start from a bibliography in biblatex format, with DATEs actually, which I can straightforwardly convert to YEAR and MONTH, in the form of my initial example. So I never had the BibTeX format of my second example. – equaeghe May 21 '13 at 7:31
  • 1
    Ah, ok. I was wondering if you had ever had them in the macro form to begin with. I'll look into this shortly as an enhancement. – PLK May 21 '13 at 9:39
  • Updated answer with new option in 1.7 – PLK May 21 '13 at 14:15
  • Using --tool_macro_fields=MONTH in the last (of three) biber --tool runs does what I want. Thanks! (N.B.: I used biber from the git dev branch, as provided by a Gentoo live ebuild.) – equaeghe May 23 '13 at 11:11

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